Anderson Espinoza, the top pitching prospect who the Boston Red Sox traded to the San Diego Padres for Drew Pomeranz, will begin this season on the disabled list with forearm tightness, per multiple reports.

Padres top prospect Anderson Espinoza will open the season on the DL because of forearm tightness. @SamDykstraMiLB first reported.

Espinoza, a 19-year-righty who the Red Sox signed as an international free agent out of Venezuela, struggled for the Low-A Fort Wayne TinCaps after the trade to San Diego last July, posting a 1-3 record and 4.73 ERA in eight outings (seven starts).